Window lock



W. M. BLAKELY WINDOW LOCK March 20, 1951 2 Sheets-Sheet l Filed Nov. '7, 1945 W.. M. BLAKELY WINDOW LOCK March 20, 1951 2 Sheets-Sheet 2 Filed Nov. '7, 1945 7| :F1Cr- E Patented Mar. 20, 1951 UNITED srATEsPATENT OFFICE WINDOW LOCK William M. Blakely, AFort Bragg, N. C. Application November 7, 1945, Serial No. 627,180

Thisinvention relates to improvements in fasteners or locks for window sashes or like closure elements, and particularly to a fastener or lock for holdingv a sash or` closure element in closed position. Y

One object of the invention is to provide an improved fastener' or lock which will automatically fasten o r lock thev sash'y or closure elementy at thenal moment of the movement of the sash orelosure element into closed position, thus ensuring. the positivefastening of the sash or4 closure element as and whenever it is closed.

Anothercbject of the invention is to provide a fastener or lock of this character which is simple of construction, reliable and eicient in action, and adapted to be manufactured and installed at a comparatively low cost.

Still another object of the invention is to provide a fastener of this character having improved manually operable releasing means including a member adapted to serve as a handle actuable to release the fastener and to aid the operator in moving the sash to open position.

With these and other objects in view, which will appear inthe course of the subjoined description, the invention consists of the novel features of construction,l combination and arrangement of parts hereinafter fully described and claimed, and as shown in the accompanying drawings, in which:

Fig. 1 is a vertical transverse section of portions of a window frame and sash, in thisinstance a lower sash, showing the application of the invention thereto, with the sash fastened in closed position;

Fig. 2 is a horizontal section on the line 2--2 of Fig. 1 showing the latch in proiected position;

Fig. 3 is a similar view showing the latch in retracted position;

Fig. 4 is a transverse section through the lower rail of the sash, taken on line 4-4 of Fig. 2;

Fig. 5 is a sectional elevation taken on line 5-5 of Fig. l looking toward the'inner face of the stile of the window frame having the keeper recess therein;

Fig. 6 is a view of a portion of the lower rail of the sash looking toward the inner face thereof and showing` the face plate with the-guide slt therein;

Fig. 7 is a section on the line 'l-l of Fig. 8 through the stem of the ngerpiece;

Fig. 8 isa side elevation and Fig. 9 an end view of the stem ofthe ngerpiece.

Referring now more particularly to Figs. 1 to 9, inclusive, of the drawings, I designates a 3 Claims. (o1. 292-127) I side stile or jambof a window frame or like y frame having an opening therein, and 2 and 3, respectively, designate the bottom rail and one of the side rails of a'window sash or like closure mounted to slide in the opening in the frame.

In accordance with -my invention the parting groove 4 of the vstile I in which the sash rail 3 slides `is formed at:l its lower end with a keeper recess 5 havin'gan undercut socket 6 at its top and an underlying' inner inclined or sloping wall portion 1.

Provided in the sashaty thepbase of the side rail 3 is a vmortise 8 communicating at its inner portion with a relatively smaller recess 9 which in turn communicates with a relatively smaller but longer recess I9 extending longitudinally within the ailjacent endjof the bottom rail 2. A latch I I is pivotally mounted at its upper end,

f as at I2, within themortise and has an upturned hook I3 aty vits Alower end. The latch is thus mounted torswing out of andl into the mortise for movement into and out of the recess 5 and the bill of rits hookA is adapted to engage the socket 5 to lock the sash in closed position. The bill of the hook I 3 is rounded, as at I4, and the hook has a curved or inclined undersurface I5, for a purpose hereinafter described. Y

Mounted to slide, transversely ofv the sash, in the mortise 8 and recesses 9 and I0, and through backing andl guide plates I6 and I1 engaging shoulders in the recesses, is a latch actuating rod I8. The latch is pivoted to the outer end of this rod, as at I9, and the rod is provided adjacent thereto with a flange or shoulder enlargement 20 movable between the mortise 8 and recess 9. A coiled spring 2| is disposed in the recess 9v between the plate I6 and shoulder 29 and acts to normally slide the rod outward and proiect the latch into locking position as shown in Fig. 1.

The rod I8 is formed with an inner portion 22 of reduced diameter to provide a stop shoulder 23. In this portion of the rod is an elongated slot 24 opening through opposite sides of the rod. The slot 24 communicates with a slot 25 formed in the inner side of the rail 2 and which is covered by a face plate 26 having a slot 2l arranged in alignment with the slot 24. An operating fingerpiece or handle 28 is arranged to bear against the face plate and has a stem 29 extending through and slidably mounted in the slots and provided with outer and inner oppositely pro- .iecting fork arms 30 and 3| lying on opposite sides of the portion 22 of the rod I8 and of its stem portion 29 whichpasses through the slot 24 in the rod, said arms being normally spaced from the shoulder 23. The sides of the outer ends of these arms which face the plate l'l are grooved to form seats 32 for the outer end of a coiled spring 33 encircling the rod portion 22 between said fork arms 3E! and 3l and the plate l?. The function of this spring 33 is to maintain the iingerpiece in proper position for operation in and relative tothe slots 24 and 21.

Figs. 1 and 2 and Fig. 3, respectively, show the locking and retracted positions of the latch, from which the working operations will be readily understood. When the sash is open and the latch retracted and the sash is being moved upward or downward the curved bill or toe of the latch It will ride on the face wall of the groove 4 whereby the latch will be held in a retracted position, but when the sash is moved downward to a closed position the latch will automatically snap into engagement withthe keeper to positively. lock the sash from upwardvmovementr By reference Yto Figs. 1 and 2 it will` be seen that outward movement ofthe bolt rod I8 to latch projecting position moves slot 24 outwardly and. allowsspring 33 to shift the stem 29 of the operating handle or iingerpiece 28 tobring the stem 29 into engagement with the inner endof slot-24 and outer Aend of` slot 21 in the face plate 26- so that lon subsequent inward sliding-movement of the ngerpiece 28 positive motion against the innerl end wall of slot 21',V maybe transmitted to slide -the rod inwardly against the resistance of springs 2l and 33 to retract the latch Il and withdrawing the rounded bill i4 of thefhook i3 from the recess 5.- This'movement of the parts will swing the latch to -its retracted position and shift the stem 29 from the .outer to the innerend of slot 21 to allow free outward movement of the rod IB when the latch is again brought into position vto engage the keeper.y When the latch is thus retracted by manualV movement of theoperating handle or ngerpiece V28 the sash will be released for free upward and downward movements to adjust it to any open position. Fig, 3 shows the position of the'parts after the sash has been unlatched to permit movement to an open position by the operation ofthe fingerpiece or handle 28, and it will be apparent that as the latch rod I8 is moved inward or to the right from the position shown in Fig. 2 tothe position shown Fig. 3 in retracting the latch the outer wall of the slot 24 will be brought into engagement with the stem 29 of the handle member as-said stem is .shifted to the, right in slotl'l. This movement ofthestem29 causes the-spring 33 to be compressed for a subsequent return action after release .of the-ngerpiece28, at which time the latch will be projected by means of the spring l2| to shift the stem 29 and ngerpiece 28 to the left to the positionshownin Figs. `l and 2.

, It will be observed fromthe foregoing that whenever the vsash is loweredit will be automatically locked, preventing oversight or forgetfulness in locking a window, while at the same time it may be ,readily unlocked for raising. The same mechanism in reverse may be used for locking upper sashes instead of lower sashes, and the mechanism may also be used for locking other types of closures in closed position. yIn practice a ixed fingerpiece may be arranged on the sash adjacent to the ngerpiece 28 and to the right of the slot 21 to enable an operator to grasp both the fixed and movable ngerpieces with one hand and retain the same in lifting the sash, so that both hands may be used in operating the sash as soon as the sash has been unlocked by retraction of the latch member from its keeper.

In order to protect the surface of the stile from injury by rubbing contact with the latch, a metallic wear plate 34 may be applied to the stile for running contact of the bill of the latch therewith. Also a guard plate 35, preferably carried by plate 34, may be arranged to close the space between the stiley I and' rail 3 at the outside of the window to prevent the introduction of a tool in surreptitious attempts to release the latch from the outside of the window. In addition to the fact that the improved lock herein described ensures the fastening of the sash each time it is closed, it will be seen that the applied lock presents no hooks orY other surfaces difcult to manipulate or to catch clothing or collect dust.

From the foregoing description, taken in connection with the drawings, the construction, mode oi operation and advantages of my improved fasenerv or lock will be readily understood andappreciated by those ,versed inthe art withouta furtherk and extended description. It--wil1 .be understood, of course, that while the structures shown herein are preferred changes inthe form, construction and arrangementof parts, such as fall withinrthe scope oi-the appended claims, may be made, without departing from thespirit or l sacriicin'gany of the advantages of the invention.

Iclaim:l i l. For use .with a sashframe having a side stile provided with a keeper, a sliding sash, a latch on the sashrail movable into and out of the plane oi the sash to keeperdisengagingand engaging positions, said latch Vbeing pivotally mounted in the sash andy havinga hook portion extending below the pivot point .and engageable .with the keeper when .disposed in register therewith and` l adapted-for running contact With the frame when out of register with the keeper to hold the latch retracted, a sliding rod within the sash pivoted to the latch below the rst named vpivot point, resilient means acting on the rod fonprojecting the latch into engagement with the rkeeper when coming into register therewith, manual means operable on `the rod and slidable with reference to thesash for moving the latch out of engagement with thekeeper, and resilient means for returning the manual rod operating means to normal position on releasethereoi, Y v j 2. For use with a sash frame having a side stile provided with a keeper, a slidingsash, a latch on the sash rail movable into and out ofV the plane of the sash to keeper disengaging and engaging positions, .said latch being pivotally mounted in the sash and having a hooked end portion extending below the pivotV point and engageable with the keeper when disposed in register therewith and adapted for running contact with the frame when out of register with the keeper to hold the latch retracted, a sliding rod mounted within the sash and pivoted to the latch .below the rst named pivot point, resilient means acting on the rod for projecting the latch into engagement with the keeper when coming into register therewith, a slidable iingerpiece operable on the rod for moving the latch out of engagement with the keeper, and resilient means acting on the fingerpiece to automatically return it to normal position on release thereof after actuation. 3. For use with a sash frame having a side stile provided with a keeper, a sliding sash, a latch on the sash rail movable into and out of the plane of the sash to keeper disengaging kand engaging positions, said latch being pivotally mounted 5 Within the sash and having a hooked end portion extending below the pivot point and engageable with the keeper when disposed in register therewith and adapted for runningcontact With'the frame `when out of register With the keeper to REFERENCES CITED The following references` are of record in the' le of this patent:

UNITED STATES PATENTS Number Name Date 111,995 Warren Feb. 21, 1871 727,968 Keilwerth May 12, 1903 1,150,412 Benus Aug. 17, 1915 1,253,826 Hoyt Jan. 15, 1918 1,526,164 McCune 1--- Feb. 10, 1925 1,932,829 Parsons Oct. 31, 1933 

